Refrigerator



FIG. 1 is a front perspective view of the refrigerator;

FIG. 2 is a right side and front perspective view of the refrigerator;

FIG. 3 is a front view of the refrigerator;

FIG. 4 is a right side and rear perspective view of the refrigerator; and,

FIG. 5 is a left side and rear perspective view of the refrigerator.

The portions of the refrigerator shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a refrigerator, as shown and described. 